The City Museum of Ljubljana is located in a true architectural monument. The permanent exhibition brings a chronological overview of the Ljubljana basin area and gives visitors the opportunity to learn about the town's history. It draws attention to the city's important geostrategic position and to the extraordinary events in the history of the area. Two of the more notable pieces on show are a wooden wheel with a wooden axle and a wooden spear point, aged around 40,000 years old. The wheel was discovered in the Ljubljana Marshes in 2002. Radiocarbon dating shows it to be approximately 5,150 years old, making it the world’s oldest. The exhibition offers an overview of Ljubljana's history in a creative and fun way with the use of interactive features, short films, guided tours and workshops.